Tractor attachment.



W. H. ZTMMERNIAN.

TRACTOR ATTACHMENT.

APPLICATION m50 SEPT.1B.1916.

Patented Sept. 17, 1918.

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Oooooobo W. H. ZBMIVIERMAN.

TRACTOR ATTACHMENT.

APPLICATION FILED SEPT. 18, 1916- Patented Sept. 17, 1918.

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f the'side and frontsair Awalmart n. ZIMMERMAN, or ourense, ILLINOIS.v

TRACTOR ATTAGHMEN T.

Lemerre.

Application med september 1s, 191e.

To all whom t may concern.'

Be it known that I, IVALTER H. ZIMMER- MAN, a citizen of the United States, residing'V at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in'Tractor Attachments,rof which the following is a specification.

My invention relates to an'improved traetor attachment by means of which an automobile may be converted into a tractor without'modiiyingthe automobile if desired with the exception that connecting devices are secured to the rear and front axles o1 the automobile Yfor engaging the tractor mechanism.

By my invention I provide mechanism for extending the rear axle of the automobile, the axle extensions serving to directly support the rear end .of the VVautomobile clear trom the ground, these axle extensions being preferably coaxial with the tractor wheels. By my invention I also provide animproved form of tractor wheel inV which' the gearing for securing the desired vspeed changes is inclosed in each tractor wheel, the -wheel being closed on its sides and provided with an'automobile oiling system so. that the wearing parts are properly lubricated with practically no attention from'theV operator.

My .invention is shown in its embodiment in the in which:

Figure 1 shows inplan view the tractor attachment and vits relation to the axles and preferred accompanying drawings wheels of an automobild'the remaining portion oit the automobile V*being removed forV the sake of elearness.

Fig. 2 shows in side view an automobile in place upon my tractor attachment,

Fig. horizontal sectionalview through'the axis of the wheel and the manner of securing the tractor wheel,

Fig. 4; shows in side elevation, thedevices ypreferably Vemployed for placing the rear wheels oi the automobile in proper position for engagement with the tractor attachment,

Figs; and 6 are detail views taken from respectively of the Vdevices employed to secure the front end ot' the tractor attachment to the fronty axle of' the automobile, Y

uFig. 7 is a detail View ofthetractor of the operating mechanism specification of Letters Patent.

3 shows one of the tractor wheels in wheel to the Vadjacent automobile.V

taken from the rear Patented sept-.17, 1918. serainof'ieotl?. l

for engaging one .of the extensionshafts .with the. :coupling: on the automobile Vrear axle,

F ig. Sis a vertical, sectional view through the outer end o1 one of the extension shafts showing the means employed to engage said shaft with the coupling on the rear axle ofV the automobile, y y y Y Y f Y F ig. 9 shows in detail view part of the 65 gear shifting mechanism carried by each tractor wheel, and V [Figs 10, 11 and 12 show modified constructions for connecting the extension axles and the rearraxle of the automobile.

Similar numerals refer to similar throughout the several views. Y

As shown in Figs. 1 and 2 the tractor attachment consists oi Ya rectangular*frameV workoft rolled metal bars Ytwo of which as indicated atl() and 11 extend transversely of the tractor and .between which the otherv maiirmembers 12, 13, 1d and 15 extend lon,- gitudina'lly offtheV tractor. Between the` members 13 and 1d? additional longitudinal B0 members 16 and 17 are connected to thetransverse members 10 and 11 and extend in front of the member 10 so that their forward endsV are slightlyin frontofthe front. axle 1S of the automobile. rIhe members 16 85 and 17 are connected together at their forward ends by a transverse member 19. Y

The connecting framework of theftractor attachment.constructed Vas described may be connectedV together in any manner known VV to the art, preferably by rivets, and. diagonal i bracing members may be provided for the framework as indicated, to make it a rigid structure under the strains to which it is subjected.V

The tractor wheels 20 and 21 are located between the longitudinal members 12-13 and let- '15 respectively, the bearings 22` and 23 of the wheel 2O being attached to the 70 parts members 12 and 13 and the bearings and 100 Y the incline under its ownpower. Between the transverse members 10 and 11 lin line with the inclined run-ways 26 and 27, similar curved channel bar supports 29 and 30 are provided, hinged at their forward ends to the member 10 as indicated in Fig. 4 and supported at their rear` ends by threadedrods terminating at their upper ends 1n cranks 31 and 32. These cranks are supported from the transverse member 11, the manner of supportv for both of them being the same as 'a result of which it will be necessary to describe but one of them, for example the crank 31. 'As shown in Fig. 4 the crank 31 is rigidly secured to the upper end of the threaded rod 33, which carries a grooved nut 34, the groove of which is engaged by a slot in the rear end ofthe supporting bar 29 so as to prevent turning of the nut 34 relatively to the bracket 35 employed to support the threaded rod from the member l11. To prevent vertical motion of the rod 33 in the bracket 35, nuts or collars 36 are rigidly secured to the upper endy of the rod on either side of the upper supporting portion of the bracket 35,. as a result of which when the rear wheel 37 of the automobile rests upon the supporting bar 29 said wheel may be moved to the desired position vertically by turning the crank 31. The supporting bars 29 and 30 are preferably provided with relatively large openings through their webs similar to and for the same purpose as the openings 28 referred to in connection. with the inclined ru aways 26 and 27. Y

As shown more clearly in Fig. 3 each of the tractor' wheels is formed from a sheet of metal" 38 rolled into cylindrical form to constitute the outer cylindrical rim of the wheel, circularly formed reinforcing bars 39 being secured to the inner surface of the rim to receive the threaded ends of the spurs 40 projecting from the outer surface of the rim when it is desired to use the tractor on soft ground.

The sides of the wheel are closed `by continuous plates 41 and 42 of thin sheet metal secured at their outer edges to the edges of the rim 38 and these side walls are dished inwardly and haveformed in them. concentric with the axis of the wheel', circular openings to permit the assembly in the wheel of the gearing and other mechanism contained therein. The inner edge of the side sheet 41 supports the bearings 43 and` 44 for the intermediate shafts 45 and 46 respectively, these bearings being connected together by a circular iiange 47.

The opening in the circular fla-nge 47 is closed by a disk 48 secured thereto, which disk has formed integrally therewith the bearing 49 for the extension axle 50. The other ends of the intermediate shafts and -46 are supported in bearings 51 and 52 secured to the inner edge of the sheet metal wal] 42, these bearings being connected together by a. flange 53 similar to the flange 47. The flange 53 supports the disk 54 which has formed: integrally therewith a bearing 55- for the outer end of the extension axle 50.

The bearings 49 and 55 are lrevol'uble with the wheel and support the bearings 24 and 25 securedV to the members 14 and 15 of the frame work. The disks. 48 and 54 are reinforced and held at a proper distance from each other by the spacing plates 58 and 59 rigidly secured at their ends to said disks.

The axle 50 carries between the disks 48 and 54 two gears 60 and 61 which are of different diameter and connected together by a sleeve 62, which is a sliding fit onthe axle 50 but is prevented from turning thereon by a feather key 63. rl`he intermediate shafts 45 and 46 have rigidly secured to them double gears 64 and 65 each gear having two sets of teeth of different pitch diameter', one for engaging the gear 60 and the other for engaging the gear 61. Each of the gears 64 and 65 is therefore in4 effect two gears. The shafts 45 and 46 have Vrigidly secured to their inner ends outside of the side wall of the tractor wheel, the pinions 66 and 67 meshing with the internal gear 68 supported by brackets 69 from the frame member 14.

As a result ofthe construction described, when the axle 50 is rotated in the bearings 49 and 55 the intermediate shafts 45 and 46v are rotated at a rate depending on which gears are in engagement and` the gears 66 and 67 are rotated upon the interna-lA gear 68 thus moving the intermediate shafts and the tractor wheel together with the bearings 49 and 55km the stationary bearings 24 and 25.

The sleeve 62 has formed in its outer surface a groove 70 engaged by a yoke 71 secured4 to the lower end of an arm 72 the upper end'of which passes through a slot'therefor in the spacing plate 58 and is secured to a rod 73` extending through the side of the wheel, and as shown in Fig. 9- the rod 73 is provided at its outer end with anV operating handle 74 outside of. the housing 75 secured to the disk 54, which housing contains the locking mechanismffor the rod.- The rod 73 has cut in its upper surface three grooves 7 6, the outer ones being at a distance apart corresponding to the distance of the gears 6() and. 61 from each other,`and the housing 75 carries a spring plunger 7.7 4which normally engages at its lower end one of the grooves 76A The rod 73 is prevented from moving longitudinally7 through the arm 72 by means of` suitable collars 78 secured to the rod on either 'side of the upper end of the arm 72, the connection however permitting rotary motion ofthe rod 73 in the arm 72.V lVhen it is desired. to shift the gears, the spring latch 77 is disengaged by first turning the.

rod 73 which lifts the latch to clearV therrengaged groove 76, after which the rod may be moved longitudinally in the housing 75V carrying ywith itV the armr72. The rod being turned again to its normalposition engages the next notch in the adjustment of the gears and retains said adjustment until it isidesired to change .the relation lof the gears. AjIt will be observed that by this means the gears may be locked either with Vthe gear 60 in mesh with the gears 64 Vand 65 orwith the gear 61 in mesh with the gears 611 and 65 or if desiredjthe shifting mechanism may be locked in an intermediate position in which neither ofthe gears is in engagement with the gears on the intermediate shafts.

The axle 50 in each of the tractor wheels is mounted in the bearings Vi9 and 55 so that it maybe moved longitudinally in said bearings toY engage the corresponding axle coupling ofthe automobile, to be driven there by and also to support the automobile, the engagement referred to constituting the only support for the rear end of the automobile so that its rear wheels may rotate freely. To

effect the engagement referred to the inner end of the axle 50 is squared or providedv with some similar suitable flattened conformation and engages a ycorresponding open-V ing in. the outei.1 end of a coupling 79 screwed on tothe threaded end of the automobile wheel as indicated and held inplace against rotation by airingl 80 which engages said coupling and is securedV thereto in any desirable manner not shown, as for example by set screws, the ring 80 having extension arms S1 engaging the face of the hub between the rivets or fastening devices holding the automobile Awheel together. `VThe axle 50 ispref.- erably held in place in the coupling 79 by a pin 82 which maybe readily removed when it is desired to disconnect the automobile from the tractor attachment.

The outer end. of each axle 50 as shown 4more clearlyin FigLSY is of reduced diameter,

and carries a sleeve S3 which is held in place by a nut or collar 84 on the end of the axle, the sleeve 83 being freely rotatable upon said reduced portion. In the under surface of the y sleeve S3 aV rack is formedl which meshes with the teeth of theV segmental gear Y 85 which is rieidlysecured to a shaft 86supported by the earing and a. bracket Y87stecured to thel rear Vend of the frame work. To

the rear of the bracket 87' the shaft 86 has rigidly secured thereto anv operating handle S8 which isY continued below the vshaft 86 as shownin Fig. 7 to form a segmental lockingV member 89 having a curved slot 90 through Y it for' receiving a locking screw 91 by which the locking member may be clampediagainst theV bracket SZvto prevent rotation of the shaft 86. 1'

As shownA in Figs. 5 and 6 the frontaxle 18 of the Vautomobile Yhas secured thereto by of the rod 93 and the member'19icarries aV spring bolt 96 supported in a bracket'l? for engaging the groove 94. When it is desired to connect an automobile with the tractor.attachment the'runways 26 and 27 are put in placewith theirV forward ends on the ground and the axles 50 are moved outwardly by means of the operating handles 88. VThe automobile is then backed .upthe runwaysrand over the transverse member 10 until the rear axle in alinement with thelshafts 50. The cranks- 3l and 32 are then turned until the rear. axle of the automobile is brought into ver-V tical alinement with the axles 50 for which condition the axles 50 are moved inwardly intoV engagement with the couplings con-g nected to the rear axle [of the automobile in which position the pins 82 are put in place and the handlesSS are locked against sub- Y sequent motion. Thecranks 31 and are Vby the connectionV of the rear axleof the automobile Awith the extensionaxles 50.V V`The front end of the framework 19. is then raised so as to bringl the spring bolt 96 into engage- 4 ment with the groove 94 in the lower end of the rod 93 which operation may beV as-V sisted or entirely performed by placing La small amount of driving effort upon the tractorijwheels; The run-ways 26 and V277 Y are then raisedand supportedin elevated position as indicated for the run-way 27 in Fig. 2, by means of hooks 98A secured to the under sideY of the ruiming boards of theV automobile` To lubricate the bearings of the extension axles 50, as well asf the bearings of theV tractor wheels, the followingdevices are previded. As shown in Fig. 3 the disks t8 and 100 respectively, extending radially away from Vthe axis ofthe disks, and the outer ends ofV these `passages areV lin connection with pipes 101. ,andV 102 vwhich Vextend outlos Wardly and slightly toward each other after.

' Zontally through them to receive the oil col# lected by the scoops which is directed into i said openings ,byV the outstanding wall-sj iso 115 54e are Y rovided with oil )assao'es 99 andY P l s that it moves back and forth freely in the pipe and when in its outermost position due to the rotation of the pipe and the wheel, the corresponding inlet openings 106 are uncovered and the oil collected by the scoop 104 may flow freely into the pipe 102. Continued rotation of the tractor wheel movesl the pipe into a more nearly vertical position for which the rod 107 under the action of gravity drops in the pipe, forcing the oil ahead of it through the pipe 102 to the bearings 55 and 25. The operation of the oiling mechanism is facilitated by the fact that the formed rim and sides of the wheel together constitute a receptacle having tight joints which will contain a considerable quantity of oil. The motion of the scoops through the oil besides directing the oil through the pipes 101 and 102 carries the oil so completely around the wheel that the intermediate shafts and the gears carried thereby are kept in thoroughly oiled condition. f Y

In case it is desired to remove the rear wheels of the automobile before connecting it to the tractor, the modified construction shown in Figs. 10 and 11 may be used to advantage. Vithtliis construction 'each rear wheel 110 of the automobile is provided4 with a hub 111 securedV to the rear axle 112 by a key and nut in 'the usual manner.V The hub 111 has its supporting flange inside of the body of the wheel so that the wheel may be removed from its hub without removing the hub from the axle, by removing the cap 113 and the nuts of the bolts 1111-. A coupling 115 is then secured to the hub by the bolts 114, said coupling having a flatl sided hole in its end to receive the end of the extension axle 50a of a tractor wheel, t-lie extension axle being held in place by a set screw as indicated. This constitutes a somewhat stronger coupling than that previously described. If it is desired to use the automobile only as a tractor, the simpler coupling shown in Fig. 12 may be employed. This consists of two flanged coupling members 116 and 117, the member 116 being secured to the rear automobile axle 112a in the usual manner and. the member 117 having a recess for receiving the axle nut and secured to the member 116 by bolts 11S. The member 117 is provided with a iat sided axial hole to receiveJ the similarly formed end of the extension axle 50i which is held in place by a split cotter pin 119 as indicated. The j end of the extension. axle if square as indicated may have intersecting, holes formed through it for receiving the pin 119, so that the squared. end may be inserted into the coupling in the first engaging position that is convenient and for any engaging position the pin 119 may be inserted.

From the above it will be observed that by my invention the rear end of the automobile is supported entirely by the extension axles by coupling devicesbetween them and the rear or power axle of the automobile and that thisis the only engagement betweenV any of the tractor attachment parts and the rear end of the automobile. It will also be observed that tlie tractor wheels directly support the extension axles and also directly support the framework, and that the framework serves only to hold the tractor wheels in proper position relatively to each other and to react against the drivingv torque ex'- erted upon the tractor wheels.

Vhile I have shown my invention in the particular embodiments above described I do not however limit myself to these exact constructions as I may employ equivalents thereof known to the art at the time of the filing of this application without departing from the scopeof the appended claims.

What I claim is:

1. Iii a tractor attachment for autoincbiles, the combination of a framework, tractor wheels carrying said framework, shafts in said tractor wheels for coupling with and supporting the rear axleof an automobile, said shafts constituting extensions of said rear axle, and a rigid coupling carried by each end of said rear axle for direct engagement with the adjacent extension axle to drive the latter.`

2. In a tractor attachment for automobiles, the combinationY of a framework, tractor wheels carrying Asaid framework, Vshafts in said tractor wheels for. coupling with and supporting the rear axle of an automobile, said shafts constituting extensions of said rear axle, reducing gearing between said shafts and said tractor wheels, and a. rigid coupling carried by each end of said rear axle for direct engagement with the adjacent extension axle to drive the latter.

3. In a tractor attachment for automosaid shafts and said tractor wheels, said gearing being contained in said Vtractor wheels, and a rigid coupling carried by each end of said rear axle for direct engagement biles, the

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with the adjacent extension axle to drive the latter. y f e Y 5. `In a tractor attachment for `automobiles, the combination of a framework, tractor wheels carrying saidzframework, shafts in said tractor wheels for coupling with and supporting the rear axle of an automobile, said shafts constituting extensions of said rear axle, Vand multiple-speed gearing between saidY shafts and said tractor wheels, said gearingV being contained in said tractor Y wheels.

wheels carrying said framework, .shafts in said tractor wheels Vfor coupling with and supportingV the rear axle of an automobile, said shafts constituting extensions of said rear axle., reducing gearing between said shafts and said tractor wheels, the ends of said shafts being flattened, and couplingson the automobile axle having openings fitting said flattened ends to drive said shafts.

8. In a tractor attachment for automobiles, the combinationV of a framework,.slid

ing shafts for receiving the rear axle of an automobile between them, tractor wheels carrying said framework and said shafts, and devices for moving said shafts to couple them Iwith the rear axle of an automobile to support the same, said shafts constituting extensions of said rear axle.

9. In a tractor attachmentforautomobiles,

the combination of a framework, sliding shafts for receiving the rear axle of an automobile between them, tractor wheels icarry ing said framework and said shafts, and gearing for moving said shafts to couple them with the rear axle of an automobile to supportl the saine, said shafts constituting extensions of said rear axle.

l0. In a tractor'attachmentV for automocombination of a framework, slidf ing shafts for receiving the rear axle of an automobile between them, tractor wheels carrying said framework and said shafts, devices for moving said shafts to couple them with the rear axle of an automobile to support thcsame, said shafts constituting extensions of said rear axle, and mechanism carried by the framework to prevent operation of said devices. Y

11. In a tractor attachment for autoniebiles, the combination of a framework, slid-V ing shafts for receiving the rear axle of anL Acarrying said framework and automobile between them, tractor wheels said shafts, gearing for movingV said shafts-to Vcouple them with the rear axle of an automobile to support the same, said shafts constituting extensions of said rear axle,fand mechanism carried bythe rear end of said framework to prevent operation ofsaid gearing.

12. In a tractor attachment for automobiles, the combination lof a framework. supporting shafts mounted in line with: each othelr, tractor wheels Vsuliporting said framewor r shafts, driving ypinions secured to said-ins termediate shafts, and gears .rigidlyv secured to said framework and engaged by said pinions,- said supporting shafts adapted to couple with and support the rear axle of an automobile and constitute extensions of said rear axle. e f

13. In a tractor attachment. for automobiles, the combination of a framework, supporting shafts mounted in line with each other, tractor wheels supporting said frai'nework and said shafts,.intermediate shafts mounted lin andcarried byl said tractor wheels and Vdriven from said supporting shafts, driving pinions secured to saidintermediate shafts, gears rigidly secured to said framework and engaged by said pinions, said supporting shafts adapted to couple withand Vsupport the rear axle of an automobile and constitute extensions `of said rear axle, and m ulti ple-rati o gearing ing shafts and said intermediate shafts.

lll. In Va vtractor attachment for automobiles, the'combination of a framework, sup- Vporting shafts mounted in line with eachV` other, tractor wheels supporting said frame- Vwork and said shafts, intermediate shafts mounted in and carried by said tractor wheels and driveny from said supporting shafts, driving pinions'secured to said intermediate shafts, and Vinternal gears rigidly secured to said framework and engaged by said pinions, said supporting shafts adapted to couple with and support therear axle of an automobile. and constitute extensions of saidV rear axle. Y Y

' 15;-'In av tractor attachmentk for automobil.es,.the combination of a framework, 'sup porting shafts'mounted in line with eachV other, tractor wheels supporting said framework and said shafts, intermediate shafts mounted in: andV carried,V by said tractor wheels and driven from said shafts, driving pinions secured to said intermediate shafts, internal gears rigidly seV- cured to said framework and engaged by said pinions, said supporting shafts adapted to couple withand support the rear axle of an automobile and constitute extensions of said rear axle, and multiple-ratio gearing and said shafts, intermediate Vshafts mounted in and carried by said tractorl.wheels and driven from-:said supporting between said supportV supporting .Y

between said supporting shaftsand said intermediate shafts.

16. In a tractor attachment for autoincbiles, the combination of a framework, supporting shafts mounted rin line with each other, tractor wheels supporting said framework and said shafts, intermediate shafts mounted in and carried by said tractor wheels and driven from said supporting shafts, driving pinions securedto said intermediate shafts, and gears rigidly secured to said framework and engaged by said pinions, said supporting shafts adapted to couple with and support the rear axle of an automobile and constitute extensions of saidl rear axle, said 'tractor wheels being formed from sheet metal and having inwardly dished sides to receive said gears.

17. In a tractor attachment for automobiles, the combination of a framework, supporting kshafts mounted in line with each other, tractor wheels supporting said framework and said shafts, intermediate shafts mounted in and carried by said tractor wheels and driven from said support-ing shafts, driving pinions secured to said intermediate shafts, and internal gears rigidly secured to said framework and `engaged by said pinions,said supporting shafts adapted to couple with and support the rear axle of an automobile and constitute extensions of said rear axle, said tractor wheels being formed from sheet metal and having inwardly dished sides to receive said internal gears.

18. In a tractor attachment for automobiles, the combination of a framework, traetor wheels carrying said framework, shafts in said tractor wheels for coupling with and supporting the rear axle of an automobile, said shafts constituting extensions of said rear axle, said tractor wheels having inclosed sides for retaining oil therein,and devices in said tractor wheels for directing the oil to the bearings thereof.

19. In a tractor attachment for automobiles, the combination of a framework, tractor wheels carrying said framework, shafts in said tractor wheels for coupling with and supporting the rear said shafts constituting extensions of said rear axle, said tractor wheels having inclosed sides for retaining oil-therein, and automatic pumps in said tractor wheels for directing the oil to the bearings thereof.

20. In a tractor attachment for automobiles, the combination of a framework, sup,-l

Copies of this patent may he vobtained .fox`

axle of an automobile,

geraet/'o porting shafts mounted in line with each other, tractor wheels supporting said framef work and sa-id shafts, intermediate shafts mounted in said tractor wheels and driven from said supporting shafts, drivingpinions secured to said vintermediate shafts, gears rigidly secured to said 'framework and engaged by said pinions, said supporting shafts adapted to couple with and support the rear axle of an automobile and constitute extensions of said rear axle, and multipleratio gearing between said supporting shafts and said intermediate shafts, -said multipleratio gearing comprising two gears of different diameter feathered upon each supporting shaft and Itwo gearssecured to each intermediate shaft,one forengagement with each of thegears on the corresponding supporting shaft, :and mechanism for moving either gear on a supporting shaft into mesh with the corresponding gear on an :inter-V mediate shaft or disengaging both of Vsaid gears as desired. Y Y

21. In a tractor :attachment vfor automobiles, the combination of a framework, tracf tor wheels, extension axles for the rear axle of an automobile, gearing between the extension axlesand -the tractor `wheels and a rigid coupling carried by `each end .of said rear axle for direct engagement with the adjacent .extension axlefto drive the latter.

Q2. :In a tractorattachment for automobiles, the combinationof a framework, tractor wheels, extension axles for the yrear axle of an automobile, and multiple-ratio gearing between the extension .axles andthe tractor wheels. Y

23. In a tractor attachment for an vautomobile, the combination of Ya framework,

tractor wheels, extension axles'in the tractor wheels -for extending and supporting the 1ear axle of an automobile, gearing between the extension axles and the tractor wheels and a rigid coupling carried by-each endof said rear axle .for direct engagementwiththe adjacent extension axle to drive thelatter.

2a. vIn a tractorattachmentfor anautomobile, the combination of a framework, tractor wheels, extension axles inthe tractor wheels for extending vand supporting the. rear axle of an automobile, land multipleratio gearing betweenthe extension axles and the tractor wheels.

In `witness whereof I 4hereunto subscribe my name this 17th day of June, A.. D. 1918.

WALTER H. ZIMMERMAN.

five cents each, by-addressingthe Commission-er of Patents,

Washington, D. C. 

